Create a self-sustaining fishery by increasing reproduction of game fish. Each Spawning Disc is a 20" concave poly disc that is elevated off the bottom of the pond by a steel weight bracket. Spawning Discs provide a stable, solid surface for bluegill, bass and crappie to deposit their eggs. Other forage fish including fatheads and threadfin shad, will use the under side of the disc to attach their eggs. When the fry hatch, they will have a ready supply of algae that will grow around the edges and beneath the discs. Available in a 3 pack or 12 pack.